         "EOF expected",
         "symbol expected",
         "numeric expected",
         "semi expected",
         "string expected",
         "\"(\" expected",
         "\")\" expected",
         "\"[\" expected",
         "\"]\" expected",
         "\"{\" expected",
         "\"}\" expected",
         "\"/\" expected",
         "not expected",
         "unexpected symbol in Expr",
         "unexpected symbol in Factor",
